<svg width="26" height="140" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg">
 <g>
  <title>sfgdemo</title>
  <style>
    .small { font: italic 15px sans-serif; }
  </style>
  <rect id="node_1" height="20" width="25" y="0" x="0" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000" fill="#7fff00"/>
  <text x="0" y="20" class="small">1</text>
  <rect id="node_2" height="20" width="25" y="65" x="0" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000" fill="#7fff00"/>
  <text x="0" y="85" class="small">2</text>
  <rect id="node_3" height="20" width="25" y="115" x="0" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000" fill="#7fff00"/>
  <text x="0" y="135" class="small">3</text>
  <rect id="node_4" height="0" width="0" y="107" x="12" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000" fill="#7fff00"/>
  <line id="edge_2" y2="107" x2="12" y1="85" x1="12" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="2" stroke="#000000" fill="none"/>
  <line id="edge_3" y2="115" x2="12" y1="107" x1="12" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="2" stroke="#000000" fill="none"/>
 </g>
</svg>
